Post and boot specifications, Post, Boot – IBM AA-RWF3A-TE User Manual

Page 88

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POST and boot specifications

When the switch is powered on or rebooted, the switch performs POST. Total boot

time with POST is at least three minutes.
Use fastboot to bypass POST after subsequent reboots. For more information about

the fastboot command, refer to the Fabric OS command reference manual for the

Fabric OS version running on your switch.

POST

POST is a system check that is performed each time the switch is powered on, rebooted,

or reset. During POST, the LEDs flash different colors. Any errors that occur during

POST appear in the error log.
Monitor POST diagnostic tests via the error log or the CLI. The POST process consists of:

Displaying preliminary POST diagnostics

Initializing the operating system

Initializing the hardware

Performing diagnostic tests that check several functions, including circuitry, port

functionality, memory, statistics counters, and serialization

Boot

Boot completes in approximately three minutes during POST. The boot process consists of:

Defining the universal port configuration set

Initializing the links

Analyzing the fabric
If any ports are connected to other switches, the switch participates in a fabric

configuration.

Assigning domain IDs and port addresses

Constructing the unicast routing tables

Enabling normal port operation

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Managing SAN Switches

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